/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen;

import static org.mybatis.generator.internal.util.messages.Messages.getString;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.internal.ObjectFactory;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class RootClassInfo {

	private static Map<String, RootClassInfo> rootClassInfoMap;

	static {
		rootClassInfoMap = Collections.synchronizedMap(new HashMap<String, RootClassInfo>());
	}

	public static RootClassInfo getInstance(String className, List<String> warnings) {
		RootClassInfo classInfo = rootClassInfoMap.get(className);
		if (classInfo == null) {
			classInfo = new RootClassInfo(className, warnings);
			rootClassInfoMap.put(className, classInfo);
		}

		return classInfo;
	}

	private PropertyDescriptor[] propertyDescriptors;
	private String className;
	private List<String> warnings;

	private RootClassInfo(String className, List<String> warnings) {
		super();
		this.className = className;
		this.warnings = warnings;

		if (className == null) {
			return;
		}

		try {
			Class<?> clazz = ObjectFactory.externalClassForName(className);
			BeanInfo bi = Introspector.getBeanInfo(clazz);
			propertyDescriptors = bi.getPropertyDescriptors();
		} catch (Exception e) {
			propertyDescriptors = null;
			warnings.add(getString("Warning.20", className)); //$NON-NLS-1$
		}
	}

	public boolean containsProperty(IntrospectedColumn introspectedColumn) {
		if (propertyDescriptors == null) {
			return false;
		}

		boolean found = false;
		String propertyName = introspectedColumn.getJavaProperty();
		String propertyType = introspectedColumn.getFullyQualifiedJavaType().getFullyQualifiedName();

		// get method names from class and check against this column definition.
		// better yet, have a map of method Names. check against it.
		for (int i = 0; i < propertyDescriptors.length; i++) {
			PropertyDescriptor propertyDescriptor = propertyDescriptors[i];

			if (propertyDescriptor.getName().equals(propertyName)) {
				// property is in the rootClass...

				// Is it the proper type?
				if (!propertyDescriptor.getPropertyType().getName().equals(propertyType)) {
					warnings.add(getString("Warning.21", //$NON-NLS-1$
							propertyName, className, propertyType));
					break;
				}

				// Does it have a getter?
				if (propertyDescriptor.getReadMethod() == null) {
					warnings.add(getString("Warning.22", //$NON-NLS-1$
							propertyName, className));
					break;
				}

				// Does it have a setter?
				if (propertyDescriptor.getWriteMethod() == null) {
					warnings.add(getString("Warning.23", //$NON-NLS-1$
							propertyName, className));
					break;
				}

				found = true;
				break;
			}
		}

		return found;
	}
}
